senator john mccain ran into some trouble when he tweeted, quote, so ahmadinejad wants to be the first iranian in space. wasn't he just there last week, end quote. many in the twitterverse called the wording racist. he later sent out another twitter saying his comments were a joke and told people to, quote, lighten up. >>> last night new jersey governor chris christie paid his first visit to david letterman, who in the past, as you might know, has secured the new jersey governor about his ample weight over 300,000 times, that's what christie likes to say. during the "late show" appearance governor christie pulled laughs when he pulled a doughnut from his pocket and ate it, bam, right there. he also read back some favorite letterman jokes. take a listen. >> here's two of them. celebrity birthday today, chris christie turns 50. he blew out the candles on his cake and he wished for another cake. a billion dollars will be spent on potato chips for super bowl sunday, and that's just governor christie's house. >> meteorologist bill karins, you know, he has an amazing sense of self-deprecatio